How Long Does Trulicity Stay in Your System?
Trulicity stays in your system for about a month after the last injection. Dulaglutide's half-life is about 5 days per the FDA label, so levels fall below 5% of the steady level in about 3 weeks.
From the Trulicity FDA label · Free, no sign-up
Trulicity half-life chart
Day 42, last dose
0.48mg
Steady state in about 4 weeks
Dose (mg)
At a glance
- Half-life
- about 5 days
- Peak after a dose
- 24 to 72 hours, median 48
- Steady state
- about 4 weeks
- Below 5% after stopping
- about 3 weeks
See your real levels
GlucoPal charts your estimated level from the doses you actually log.
Read the chart as a table
Trulicity 1.5 mg, last dose on day 42. Modeled amounts absorbed, not blood levels.
| Timepoint | Estimated amount (mg) | % of steady peak |
|---|---|---|
| Day 0 on treatment | 0.00 | 0.0% |
| Day 1 on treatment | 0.46 | 50.3% |
| Day 2 on treatment | 0.53 | 58.5% |
| Day 3 on treatment | 0.50 | 55.2% |
| Day 7 on treatment | 0.30 | 32.9% |
| Day 14 on treatment | 0.42 | 45.4% |
| Day 21 on treatment | 0.46 | 50.1% |
| Day 28 on treatment | 0.47 | 51.9% |
| Day 35 on treatment | 0.48 | 52.6% |
| Day 42, last dose | 0.48 | 52.9% |
| 1 day after the last dose | 0.88 | 96.3% |
| 2 days after the last dose | 0.90 | 98.5% |
| 3 days after the last dose | 0.82 | 90.1% |
| 7 days after the last dose | 0.48 | 53.0% |
| 14 days after the last dose | 0.18 | 20.1% |
| 21 days after the last dose | 0.07 | 7.6% |
| 28 days after the last dose | 0.03 | 2.9% |
Educational estimate, not a blood level or medical advice. Follow your prescriber's instructions.
What is the half-life of Trulicity?
Trulicity's elimination half-life is about 5 days, per the FDA label: that is how long it takes for the amount of dulaglutide in your body to halve. Levels peak 24 to 72 hours, median 48 after a dose, and on the label schedule (a weekly injection) they reach steady state about 4 weeks after the first dose. After a last dose they fall below 5% of that steady level in about 3 weeks.
Between scheduled doses, levels swing between a peak and a trough of about 53% of that peak, which is why the chart looks like a sawtooth rather than a flat line. The label also reports that 47% at 1.5 mg and above of each dose is absorbed into circulation; the chart's mg figures build that in.
What if you miss a dose of Trulicity?
The Trulicity label instructs that a missed dose be taken as soon as possible if at least 3 days (72 hours) remain before the next scheduled dose; otherwise skip it and resume the regular schedule.
That window is the half-life doing the work: with about 5 days of half-life, a late dose still lands on a meaningful base. This is the label's instruction to prescribers, not our advice; if you have missed a dose, your own label and prescriber are the authority.
The familiar weekly arithmetic
Trulicity follows the pattern every 5-day-half-life weekly injectable shares: a week after a dose roughly half is still on board, each new dose lands on that base, and the whole system settles into its steady rhythm after about four weekly injections. The 72-hour missed-dose window in the label is the same arithmetic expressed as a rule.
Peak levels arrive later than with tirzepatide (median 48 hours versus 24), so the day-after-injection experience differs slightly even though the weekly timeline matches.
FAQ
Is the Trulicity half-life the same as Ozempic?
Close but not the same: dulaglutide (Trulicity) has a half-life of about 5 days, semaglutide (Ozempic) about 7. Both support weekly dosing; Ozempic takes roughly a week or two longer to clear fully after a last dose.
Why does Trulicity feel weaker right before the next dose?
Two things stack. By the end of the week your level really is at its trough, about 53% of the post-dose peak. But blood level is not the same as felt effect: appetite suppression has its own timetable, and receptors adjust, so the day-6 dip many people report is real without meaning the medication is gone.
Does a higher Trulicity dose take longer to leave your system?
Not meaningfully. Trulicity is eliminated proportionally: the amount cleared per day is a fixed fraction of what remains, so every dose falls along the same percentage curve on the same timeline. A higher dose means more dulaglutide at every point, not a longer goodbye.
Are these numbers my actual blood levels?
No. The curve is a population estimate built from the FDA label's median half-life and absorption figures: anyone who took the same doses on the same days would see the same chart. Individual metabolism runs faster or slower than the median, so treat it as the shape and rough scale of your levels, not a measurement.
Is this calculator free, and do I need to sign up?
Yes, it is free, and no sign-up or email is required. You see the full curve and the estimated clearance timeline instantly. The GlucoPal iOS app it comes from is also free to download.
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Sources
Built and maintained by GlucoPal, the free app for iPhone and Android for tracking GLP-1 weight loss medications. All pharmacokinetic figures were read directly from the current FDA label on DailyMed on 27 August 2026 and re-checked on 2 October 2026.
You take your GLP-1s. We'll take care of the rest.
